Eleusis is a town in Greece.
Eleusis may also refer to:
- Eleusis (beetle), a genus of unmargined rove beetles
- Eleusis (Boeotia), a town of ancient Boeotia
- Eleusis (card game), an inductive logic card game
- Eleusis (mythology), mythological eponym of the town Eleusis
- Eleusis (Thera), a town of ancient Thera (Santorini)
- Eleusis (organization) , Polish abstinence organization founded by Wincenty Lutosławski